Elastic vehicle-tire.



y PATENTEE SEPT. s, 1903.

W. EEEMELE.

ELASEIG VEHICLE TIRE.

APPLIUATIOE FILED LUG. 1i, 1907.

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@uw w UNITED srl-liras PATENT onirica.

WILLLM BRAMELD, OF PATERSON, NEW JERSEY, ASSIGNOR OF ONETENTH vTO JAMES T.

JORDAN, OF PATERSO. NEW JERSEY.

ELASTIC VEHICLE-TIRE.

Specification of Letters Patent.

Patented Sept. 8, 1908.

Application led August 14, 1907. Serial No. 388,449.

' ment in Elastic Vehicle-Tires; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention is an improvement in vehicle wheels having elastic tires which have their base portions laterally exparisible in character and thereby adapted tdinteriock with the grooved rim of the wheel, and it has for its object to so construct the tire as to render the interlocking action of the tire and rim more effectual and secure.

A further obect of my invention is to so construct an eastic tire of the pneumatic type that it will be adapted to eiiectuall sustain the load borne thereby even thouvh the air should escape and cease to practican maintain the tire in inflated condition; Wit

respect to this object, my) invention is appli-.

cable in certain as ects t ereof to pneumatic tires whether of t e single or pluri-tube variety.

The accompanying drawing shows my invention as `ipplic'd to a tire of the clencher pneumatic type, the view being a cross-sec` tion through the tire.

ain the drawing is the rim' and l) one of the spokes. The rim is of that form which is c iaracterized by having its edge portions c turned inwardly toward each other to form the op osed grooves d. Y

In e adaptation shown, the tire comprises the outer member or casing e and the inner member or core f. Both members are preferably formed of elastic material, such as 1s commonly used in the manufacture of elastic rubber vehicle tires.

The member e may be formed in substantially the same shape as the outer member or casing of the ordinary clcnchcr pneumatic tire, 1t having in its hase portions g the lat eral llanges h which engage in the grooves of the rim a and, under internal pressure, thus interlock the tire with the fini. I prefer, howevcrto form the base portions g ol the member e with a slight convexity i von the in* side thereof, for a purpose hereinafter indicated.

The member or core f is so constructed that it substantially snugly fits' the inside of the member or casinT e at all' points` when the parts are adjusted to the rim.

tion substantially in the form of a wed e, viewm said member cross-'sectionally, 51e sides o the, wedge being slightly concave to accommodate the convexities 'l of the'base Thus, the inner or core member f will have its base por# portions g of member e. `Furthermore, the ase portion j of member f extends between the separated parts forming the base portion of member e and bears squarely against the rim a, as at k.

As so far described, and without any reard to Whether or not member f is formed reinforced, and partly to make allowance for the tendency oi the sides of the base-portion j of member f to bulge laterally under the compression of said member. The effectiveness of the base portion j of member f as a. wedge is thus maintained although compres sion may to some extent alter its shape.

Where the tire is of the pneumatic type, I I

provide it with cells l which are preferably narrow and radiate from a common central bore or chamber m.. The hollow formation of the tire thus )reduced extends continuously thereof so that when the tire is iniiated air will occupy the chamber n and all of the cells`l. By forming the cells l narrow, sectorshaped, closely disposed, internal ribs n are formed in the core so that, should the tire be puncturcd and t 1c air escape, said sectorshaped ribs n will cooperate with each other to retain the tire in such shape as to ndequatcly bear the load and prevent such a ool lapse of: the tire as to make it inexpedient to further usvifnfl rffrllattdf;

1t will be o served that one of the cells l vextends down into the Wedge shaped base portion or member f; thus, when the tire is in- Hated, the air pressure being admitted into the base portion of the tire, it acts to expand 5 the same and increase the interlocking action between the tirejand rim, and yet, being limited in Width, it will not allow so much play roin the face of one rib n tothe other as to -permit'thc tire to become unlocked from the 1o under a sidew'ise ress ure, as turning. Havin thus fully escnbed my invention,

what VI c aim as new andv desire to secure by vsLetters Patent is: l, An elastic unitary ating ,in theyrossssection of'the member,V 25 fromjsubstantially a common center, eachl August; 19o?.

cell extendiiv` short ci the exterior surface or said member but having its radial dimension equal to the maior portion of the corresponding dimension ci said member, substantially as described.

3. In a vehicle tire, the combination of a rim having opposed grooves and a tire having an expandni'g base portion formed with lateral flanges iuterlocked with the grooves of the rim, said tire having cells radiating, in the cross-section of the tire, from a substantially common centcr, each cell extending short of the exterior surface of the tire but having its radial dimension e ual to the mn.- jor portion of the correspon in dimension of said tire, and one of said ce s extending into said base portion, substantially as de scribed.

In testimony, that I claim the foregoing, I have hereunto set my hand this 10th day of 4 t v WILLIAM BRAMLD. Y 'Witnessem Y 4 JOHN W. S'rnvnnn, Jas. T. JORDAN. 

